Steam-boiler furnace



(No Model.) 2 Sheets-Sheet 1.

M. E. HERBERT. STEAM BOILER FURNAGE. No. 454,350. Patented June 16,1891.

ATTORNEYS Z r m L mf m e va. C

(No Model.) 2 Sheets-Sheet 2.

M..E. HERBERT. STEAM BOILBR PURNAGB.

Nof 454,350. Patented June 16, 1891.

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UNITED STATES PATENT OFFICE.

MICHAEL E. HERBERT, OF ST. JOSEPII, MISSOURI.

STEAM-BOILER FURNACE.

SPECIFICATION' forming part of Letters Patent No. 454,350, dated June16, 1891. Application filed September 11, 1890. Serial No. 364,697. (Nomodel.)

To ctZZ whom, t may concern.'

Be it known that I, MICHAEL E. HERBERT, of St. Joseph, in the county ofBuchanan and State of Missouri, have invented a new and usefulImprovement in Steam-Boiler Furnaces, of which the following is aspecication.

My invention relates, generally, to steamboiler furnaces, and moreparticularly to certain improvements upon Patent No. 31,591,863, grantedme February 1S, 1800.

The objects of my invention are, first, to provide a steam-boilerfurnace that shall give great heat capacity and shall insure an economyin the consumption of fuel by burning the smoke and gases arising fromthe fuel; second, to provide an improved boiler-furnace which may beused in connection with an ordinary tubular boiler or any other type ofboiler, and, third, to provide a furnace that shall be easy of operationand substantial in construction.

Vith these objects in view my invention consists of a fire-box dividedinto two compartments by a water-leg, water-legs forming the sides ofsaid fire-box, a feeding-grate adapted to carry the fuel from onecompartment to the other, and passages surrounding the fire-box forconducting the smoke and gases to be consumed.

My invention consists, further, in the peculiar constructions of variousparts and their novel combination or arrangement,A whereby the variousobjects are accomplished, all of which will be more fully hereinafterdescribed, and designated in the claims.

In the drawings forming a part of this specification, and in which thesame letters of reference indicate the same parts, Figure 1 is atransverse vertical section of my improved boiler-furnace on the line :nno, Fig. 2. Fig. 2 is a longitudinal vertical section.

In the practical application of my invention I employ a flue-boiler B ofany preferred pattern, which is set in the casing or brickwork A andprovided with a front Z). The forward end of the boiler does not extendto the furnace front. Tater legs or chambers C are arranged on each sideof the boiler at the forward end of the same, said water-legs beingindependent of and extending some distance below the boiler and formingthe sides of the fire-box of the furnace.

A wall D, of fire-brick or other suitable material, is arranged betweenthe boiler-head and .furnace front adjacent to the front, or, ifdesired, a water leg or chamber may be employed instead of a solidrefractory wall. A water-leg E depends from the forward end of theboiler, extending into the fire-box a considerable distance, saidwater-leg being connected with the side legs C intermediate their ends,thus dividing the fire-box transversely into two compartments-a forwardand rear one. '.lhe side legs extend only as far forward as the wall D,but extend rearward beyond the combined water-drum and bridgewall F,which is also connected with said side legs or chambers. ThedependinglegE is connected with the legs C forward of their verticalcenters, thus forming a narrow magazine and feed-chute G between thefront wall and said leg.

The furnace front is provided with the upper and lower doors Hand Il',respectively, said doors communicating with the fire-box, the purposesof which will appear farther on. The upper door is also provided withperforations 7L. A plate I is arranged over the forward compartment ofthe fire-box, said plate forming the base of the smoke stacker iiue S.

A compound grate K is arranged in the bottom of the fire-box, said gratecomprisingl a feeding portion K and a dumping portion Y2. The boiler Band side legs or chambers C are connected with each other by the tubesM, which pass through the forward compartment of the fire-box. The sidelegs or chambers rest upon the upper edges of the ashreceptacle, saidreceptacle having a downwardly and forwardly inclined bottom Z, and isprovided with` a door Z forward of the furnace front, whereby the ashesmay be removed. The casing or brick-work is of course closed at the topeither Vby plates or other means, and at the rear is provided with anarch A2. Fines or passages A are formed between the side legs and casingand the front wall D and furnace front. The wall l) is provided with aseries of perforations d, and the portions of the side legs C forward ofthc leg E are provided with a series of tu- IOO bular stay-bolts e, thusforming a communication Vbetween the chute and passages A. The flues orchambers A extend down below the grate, and the sides of theash-receptacle are also perforated, as shown .at Z2. The boilerand sidelegs are also connected by means of the tubes N, and a series ofcirculation-tubes O are connected with the rear end of the boiler,whereby a thorough circulation of water is maintained.

The method of operating my improved furnace is as follows: Fuel isintroduced through the upper door H and passes into the chute G andforward compartment. Any desired quantity of fuel can-be fed into therear compartment. Air is admitted through the perforations h in the doorH, and, mingling with the fresh fuel, produces gases and smoke, whichpass through the perforations d and c, down the ilues A', through theperforations Z2 beneath the grate, thence up through the grate-barscovered with live coals, when the gases and smoke are consumed,theproducts of combustion passing over the bridge-wall and water-drum,under the arch A2, through the iue or tubes S, and out through the stackS. When it is desired to remove ashes, clinkers, the., the dumping-grateis rotated, discharging the ashes into the receptacle Il, and live coalsare fed to the rear compartment to take the place of those discharged,and when it is necessary to use a poker the lower door II is thrown openand the poker inserted and raked backward and forward.

By means of the feeding-grate the fire-box is uniformly supplied withlive coals, and by perforating the forward wall, side legs, andash-receptacle and arranging the passages as described the gases andsmoke of the magazine are returned and consumed. The waterleg E exposesa great deal of surface to the heat and also divides the fire-box.

Having thus described my invention, what I claim as new is 1. In asteam-boiler furnace, the combination, with the perforated sidewater-legs of the fire-box connected with the boiler, of the dependingwater-leg communicating with the side Water-legs intermediate their endsand the forward lire-box wall independent of the furnace front,substantially as shown and described.

2. In a steam-boiler furnace, the combination, with the side water-legsof the fire-box, of a refractible forward fire-box wall, and thedepending leg portion communicating with the side legsintermediate theirends and dividing the fire-box transversely into two compartments,substantially as shown andr described.

3. In a steam-boiler furnace, the combination, with the perforated sidewater-legs, the perforated forward fire-box wall, and the imperforatedepending water-legcommunicating with the side waterdegs intermediatetheir ends and dividing the fire-box into two com-v partments,substantially as shown and described.

el. In a steam-boiler furnace, the combination, with the side legs, ofthe depending legs connecting` the same, the feeding-grate, theperforated forward wall, flues or passages between the casing andforward wall, and the ash-'receptacles having perforated sides,substantially as shown and described.

5. In a steam-boiler furnace, the combination, with the side water-legs,the depending water-leg connecting said side legs with the forward wallof the fire-box, the feeding-grate, the doorleading into the fire-box,the portions of the side legs between the forward wall and depending legbeing perforated, the iiues arranged adjacent to said portions, and theashreceptacle having perforationsin its sides beneath the grate,substantially as shown and described.

6. In a steam-boiler furnace, the combination, with the side water legsor chambers, the depending water-leg connecting said side legs, theperforated forward lire-box wall,the side legs having perforationsbetween the forward wall and depending leg, the feed-door communicatingwith the firebox and having perforations for the admission of air, thecombined feeding and dumping grate, the fiues between the side legs andfront wall and casing, and the ash-receptacle having perforations belowthe grate, substantially as and for the purpose described. y

7. In a steam-boiler furnace, the combina tion, with a nre-box, of adepending waterleg dividing said box into two compartments,

one of which is a perforated magazine-chute, compartment, flues, orchambers surrounding the fire-box, and communication with the perforatedmagazine-chute, substantially as shown and described.

MICHAEL E. HERBERT.

Vitnesses:

M. J. BLooMER, E. L. WARREN.

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